The ratio of the number of green stickers to blue stickers is 9 : 7.
After Adam buys 50 green stickers and 60 blue stickers,
there is an equal number of green stickers and blue stickers.
How many stickers does Adam have now?
|
Green |
Blue |
Before |
9 u |
7 u |
Change |
+ 50 |
+ 60 |
After |
9 u + 50 |
7 u + 60 |
The number of green stickers and blue stickers are equal in the end.
9 u + 50 = 7 u + 60
9 u - 7 u = 60 - 50
2 u = 10
1 u = 10 ÷ 2 = 5
Number of stickers that Adam has now
= 9 u + 50 + 7 u + 60
= 9 u + 7 u + 50 + 60
= 16 u + 110
= 16 x 5 + 110
= 80 + 110
= 190
Answer(s): 190